1. Control unit error
2. The error persists after reset
1. Check 120V stability. If voltage is deviating more between +10% and -15% the electrical power supply needs to stabilised.
Check the ribbon cable between the control unit and the display. Incorrect data will be detected in case of a poor connection between the control unit and the display. If necessary, replace the ribbon cable between these two components.
2. Software error control unit. replace the control unit. The controller will automatically load the program into the new control unit.
